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cppunit_timer.h
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1/*
2 * Copyright (c) 2006
3 * Francois Dumont
4 *
5 * This material is provided "as is", with absolutely no warranty expressed
6 * or implied. Any use is at your own risk.
7 *
8 * Permission to use or copy this software for any purpose is hereby granted
9 * without fee, provided the above notices are retained on all copies.
10 * Permission to modify the code and to distribute modified code is granted,
11 * provided the above notices are retained, and a notice that the code was
12 * modified is included with the above copyright notice.
13 *
14 */
15
16#ifndef CPPUNIT_TIMER_H
17#define CPPUNIT_TIMER_H
18
19#if defined (_WIN32)
20# define CPPUNIT_WIN32_TIMER
21# include <windows.h>
22#endif
23
24class Timer {
25public:
27#if defined (CPPUNIT_WIN32_TIMER)
28 m_start.LowPart = m_restart.LowPart = m_stop.LowPart = 0;
29 m_start.HighPart = m_restart.HighPart = m_stop.HighPart = 0;
30 QueryPerformanceFrequency(&m_frequency);
31#endif
32 }
33
34 void start() {
35#if defined (CPPUNIT_WIN32_TIMER)
37#endif
38 }
39
40 void restart() {
41#if defined (CPPUNIT_WIN32_TIMER)
42 QueryPerformanceCounter(&m_restart);
43 if (m_start.HighPart == 0 && m_start.LowPart == 0) {
44 m_start = m_restart;
45 }
46#endif
47 }
48
49 void stop() {
50#if defined (CPPUNIT_WIN32_TIMER)
53 if ((m_stop.HighPart != 0 || m_stop.LowPart != 0) &&
54 m_restart.HighPart != 0 && m_restart.LowPart != 0) {
55 m_stop.HighPart += (stop.HighPart - m_restart.HighPart);
56 if (stop.LowPart < m_restart.LowPart) {
57 if (m_restart.LowPart - stop.LowPart > m_stop.LowPart) {
58 m_stop.HighPart -= 1;
59 }
60 m_stop.LowPart -= m_restart.LowPart - stop.LowPart;
61 }
62 else {
63 if (stop.LowPart - m_restart.LowPart > 0xFFFFFFFF - m_stop.LowPart) {
64 m_stop.HighPart += 1;
65 }
66 m_stop.LowPart += stop.LowPart - m_restart.LowPart;
67 }
68 }
69 else {
70 m_stop = stop;
71 }
72#endif
73 }
74
75 double elapsedMilliseconds() const {
76#if defined (CPPUNIT_WIN32_TIMER)
77 LARGE_INTEGER elapsed;
78 elapsed.HighPart = m_stop.HighPart - m_start.HighPart;
79 elapsed.LowPart = m_stop.LowPart - m_start.LowPart;
80 return (double)elapsed.QuadPart / (double)m_frequency.QuadPart * 1000;
81#else
82 return 0;
83#endif
84 }
85
86 static bool supported() {
87#if defined (CPPUNIT_WIN32_TIMER)
88 return true;
89#else
90 return false;
91#endif
92 }
93
94private:
95#if defined (CPPUNIT_WIN32_TIMER)
96 LARGE_INTEGER m_frequency;
97 LARGE_INTEGER m_start, m_stop, m_restart;
98#endif
99};
100
101#endif
void start()
Definition: cppunit_timer.h:34
void stop()
Definition: cppunit_timer.h:49
double elapsedMilliseconds() const
Definition: cppunit_timer.h:75
void restart()
Definition: cppunit_timer.h:40
static bool supported()
Definition: cppunit_timer.h:86
BOOL WINAPI QueryPerformanceFrequency(OUT PLARGE_INTEGER lpFrequency)
Definition: perfcnt.c:45
BOOL WINAPI QueryPerformanceCounter(OUT PLARGE_INTEGER lpPerformanceCount)
Definition: perfcnt.c:23
static const char mbstate_t *static wchar_t const char mbstate_t *static const wchar_t int *static double
Definition: string.c:80
LONGLONG QuadPart
Definition: typedefs.h:114
ULONG LowPart
Definition: typedefs.h:106